Re: Re: Re: Farmall H live hydraulics saga continues...

Posted by Bob M on January 10, 2003 at 11:40:26 from (165.170.128.68):

In Reply to: Re: Re: Farmall H live hydraulics saga continues... posted by Steven@nd on January 10, 2003 at 10:00:44:

Steven - Glad you found my comments helpful!! Here's a bit more:

Although a universal joint is in principle a simple device, analysis of the output motion profile thru a U-joint is actually quite complex for anything other than the ideal straight line (no angle) condition. I can send you a calculation for a single joint operating at an angle if you wish. It'll fill an entire page, and guarantee will cause your eyes to glaze!

However a rough rule of thumb says that for a two U-joint setup, IF the input and output shafts are parallel, AND IF the two joints are in phase, you can safely run a max of about 10 degrees of angle thru each joint at "reasonable speeds" (As a farm kid I regard "reasonable speed" to mean 540 RPM....) Change any of the above conditions you must reduce RPM and/or power transmitted to achieve reasonable performance and life.

To your belt size question, by synchronous belt, I mean a flat, toothed belt like the timing belts used on many modern car engines - NOT a cogged B section V-Belt. There are several mfr's resources that will help you to figure the right belt/sprocket size. You might try Emerson Power Transmission (formerly Browning), Morse, Gates, etc - check your local power transmission supply house for catalogs and application guides.

A quick look in my old Browning catalog says that a 1" wide type H (1/2" pitch) "Gearbelt", with 30 tooth drive and driven sprockets (about 5-1/2" outside diameter) is good for a bit less than 10 HP at 1,750 RPM - more than sufficient to run a live pump on an H. ...Bob M

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